In another major breaststroke upset, Scott Weltz won the 200 meters at the U.S. Olympic swimming trials Friday night, leaving Hansen and Shanteau with only one individual event at the London Games.

On a night when Ryan Lochte and Michael Phelps were focused on getting through semifinal races, Nathan Adrian won the 100 freestyle and Cullen Jones claimed the second spot for London, while Natalie Coughlin barely survived her last chance to make it back to the Olympics.

The men’s 200 breast was just as shocking as the women’s 100 breast, which was won by Breeja Larson over Rebecca Soni and Jessica Hardy. At least Soni got second place, still good enough for a do-over in the Olympics.

Neither Hansen nor Shanteau were as fortunate.

“My whole body was kind of tingling and I was like, ‘I’m feeling it and something is different, this is the time,’” Weltz said. “I was smiling behind the blocks, I wasn’t nervous. I felt great going into it.”

Clark Burckle claimed the second spot on the Olympic team, another big surprise. Shanteau finished third and Hansen faded to fourth, which means they’ll have to settle for only swimming the 100 breast in London after going 1-2 in that event at the trials.

The 25-year-old Weltz moved up on the third lap and surged to the finish to win in 2 minutes, 9.01 seconds. Burckle was next in 2:09.97, edging Shanteau with the touch.

Shanteau, who competed in the 200 breast at Beijing after being diagnosed with testicular cancer, considers the longer event his better race and thought the 100 was just a bonus. Now, it’s his only Olympic race, which is why he was especially distraught when he looked up at the board and saw that Burckle got him by eight-hundredths of a second.

Adrian was a big favorite in the 100 free, and this race went as expected. The 23-year-old native of Washington state led at the flip and never let up on the return lap, winning clearly in 48.10, the fourth-fastest time in the world this year.

The real battle was for the second individual spot. Jones went out strong, as always, and managed to hold on in an outside lane to touch in 48.46, giving the first African-American ever to win an Olympic swimming gold a chance to add to his collection in London.

“He’s somebody definitely good to have on the team,” said Phelps, remembering how Lezak bailed out his bid for eight gold medals with a brilliant anchor leg in 2008. “We are going to have to do a lot of work for that relay. This is some kind of start. Having the experience that Jason has, hopefully he can help some of the younger guys get up.”

Coughlin hung on in her quest to make it back to a third Olympics and take a shot at tying Jenny Thompson and Dara Torres as the most decorated female Olympians in U.S. history.

Having already missed out in the 100 butterfly and 100 backstroke, Coughlin is down to her final realistic chance in the 100 freestyle. She barely got out of the semifinals, finishing sixth in her heat but seventh overall to qualify for tonight’s final.

On a busy night. Lochte cruised through the semis of the 200 backstroke with the fastest time at 1:55.73. Tyler Clary was next (1:55.88) in what looks like a two-man race.

Lochte returned less than an hour later for the semifinals of the 200 freestyle, which was Phelps’ only event of the night. Racing side-by-side again, Lochte was top qualifier again with the fastest time in the world this year (1:55.51), while Phelps was about a body length behind (1:56.66).

“I knew he kind of took off, so I was like I probably should save something for tomorrow,” Phelps said. “I kind of shut it down once the race was kind of over.”

They will be right next to each other again tonight in the finals, their final showdown on the trials. They’ve each won a head-to-head meeting, a tantalizing glimpse of what awaits at the meet that really matters in London.

In the night’s other final, Cammile Adams pulled away to win the 200 butterfly in 2:06.52. Kathleen Hersey claimed the second Olympic berth (2:07.72), more than a second ahead of third-place finisher Kim Vandenberg.